Exponential-weight algorithm attains Õ(√(T γ_T)) adversarial regret for kernelized bandits, with matching lower bounds for SE and Matérn kernels plus a Nyström-efficient variant.
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Nearly-Optimal Algorithm for Adversarial Kernelized Bandits
Exponential-weight algorithm attains Õ(√(T γ_T)) adversarial regret for kernelized bandits, with matching lower bounds for SE and Matérn kernels plus a Nyström-efficient variant.